SeaGel™ combines MatrixCarbon™ and PhosGuard™ to create an enhanced product, ideal for reef/marine aquariums requiring organic color body/acid removal without added phosphate. MatrixCarbon™ cleans organic/coloring impurities, while PhosGuard™ removes phosphate, silicate, metals, and acids. Both products are bead-shaped, creating improved water flow & penetration. SeaGel™ is available in sizes 100mL-4L & can be used in freshwater without phosphate buffering.